Intermittent fasting can be divided into 5 stages, from feeding to post absorptive to gluconeogenesis to ketosis to protein conservation. Each stage is accompanied by different physiologic processes, so understanding the stages allows you to target the benefits of intermittent fasting.
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By Jason Fung, MD
Jason Fung, M.D., is a Toronto-based nephrologist (kidney specialist) and a world leading expert in intermittent fasting and low-carb diets.